# Service difficulty reports: Enstrom Helicopter 280C A list on [Enstrom Helicopter 280C](https://openairdocs.org/model/enstrom-helicopter-280c.md). Newest first. General aviation reporting is voluntary. - [SDR PNR2004F00002](https://openairdocs.org/sdr/PNR2004F00002.md): Doubler · cracked · May 19, 2004 · N646H · Enstrm 280C · Rotorcraft Tail Boom > BULKHEAD DOUBLER UNDER NR 3 TAILROTOR DRIVESHAFT PILLOW BLOCK FOUND CRACKED. CRACKS WERE PROPAGATING FROM THE RADIUS AREA ON BOTH UPPER TABS WERE THE NUT PLATES ARE RIVETED ON. BOTH NUT PLATES HAD PREVIOUSLY BEEN ROUNDED IN THE RADIUS AREA TO REDUCE THE CHAN - [SDR PNR2004F00001](https://openairdocs.org/sdr/PNR2004F00001.md): Bearing · delaminated · May 19, 2004 · N646H · Enstrm 280C · Rudder Structure > PILOTS COMPLAINED ABOUT HEAVY COLLECTIVE AND EXCESSIVE AMOUNT OF RT COLLECTIVE INPUT TO FLY. UPON INSPECTION OF THE LAMIFLEX BEARINGS, IT WAS DISCOVERED THAT THE RUBBER AND BRASS MATERIAL WAS EXTRUDING AND DELAMINATING. UNABLE TO DETERMINE CAUSE. USEFUL LIF - [SDR 2003FA0001065](https://openairdocs.org/sdr/2003FA0001065.md): Control Cable · worn · Oct 2, 2003 · N646H · Enstrm 280C · Tail Rotor Control System > BOTH REAR TAIL ROTOR CONTROLS CABLES WERE WORN WHERE THEY PASS THROUGH PLASTIC FAIR-LEADS IN AFT BULKHEAD OF TAIL BOOM. BOTH WERE WORN TO 40-50 PERCENT INSP CRITERIA. THIS IS BECOMING A CHRONIC PROBLEM AS RECORDS INDICATE THEY WERE REPLACED 1 MAY 2001, AFT O - [SDR 2003FA0001064](https://openairdocs.org/sdr/2003FA0001064.md): Clutch · worn · Oct 2, 2003 · N646H · Enstrm 280C · Engine/Transmission Coupling > ON DRIVE BELT CLUTCH MECHANISM, THE SPRING HAD WORN THROUGH THE SIDE OF THE HOUSING FROM MANY HOURS OF RUBBING BACK AND FORTH. THE ABOVE MENTIONED SPRING AND THE SPRING CAP WERE ALSO WORN BEYOND THE INSPECTION CRITERIA IN THE MFG MM. AS FAR AS WE COULD TELL - [SDR 6462003F00000](https://openairdocs.org/sdr/6462003F00000.md): Control Cable · worn · Jun 1, 2003 · N646H · Enstrm 280C · Tail Rotor Control System > BOTH LEFT AND RIGHT TAIL ROTOR CONTROL CABLES SHOW EXCESS WEAR, WHERE THEY PASS THRU THE FAIRLEADS IN THE AFT TALL CONE BULKHEAD. CABLES HAVE BEEN WEARING IN THIS LOCATION CONSTANTLY EVERY 300 TO 400 HOURS. SUGGEST A WIDER CONTACT SURFACE AREA AT THE FAIR LE - [SDR 2002FA0000586](https://openairdocs.org/sdr/2002FA0000586.md): Connecting Rod · failed · Mar 1, 2002 · N51657 · Enstrm 280C · Reciprocating Engine Power Section > NR 2 CONNECTING ROD BOLT FAILED CAUSING CONNECTING ROD TO GO THROUGH CRANK CASE CAUSING MAJOR ENGINE FAILURE. ENGINE DESTROYED. TOP OF BOLT FAILED CAUSING ROD CAP TO BEND BACK AND EVENTUALLY FAIL. THREADED END OF THE BOLT FOUND IN BOTTOM OF ENGINE CASE IN G - [SDR 2003FA0000350](https://openairdocs.org/sdr/2003FA0000350.md): Line · broken · Jan 4, 2002 · N646H · Enstrm 280C · Aircraft Fuel Distribution System > THE TUBE FAILED INSIDE THE FERRULE ON THE ENGINE DRIVEN FUEL PUMP FITTING DUE TO RUBBING AND VIBRATION. FAILURE WAS FOUND AFTER PILOT COMPLAINED OF LOW M.A.P., ABOUT 2 IN HG, AT MAXIMUM OPERATING PERIMETERS, AND FUEL CONSUMPTION LOW. - [SDR 2001FA0000685](https://openairdocs.org/sdr/2001FA0000685.md): Valve Seat · loose · Dec 11, 2001 · N123MT · Enstrm 280C · Reciprocating Engine Cylinder Section > NUMBER 4 CYLINDER HAD AN INTAKE VALVE SEAT COME LOOSE AND THE PISTON HAD BROKEN RINGS. SUBSEQUENT LOSS OF POWER. - [SDR AUS20010724](https://openairdocs.org/sdr/AUS20010724.md): Bearing · failed · May 25, 2001 · Enstrm 280C · Main Rotor Head > (AUS) MAIN ROTOR HEAD LAMIFLEX BEARING FAILED. SUSPECT CAUSED BY GREASE CONTAMINATION. - [SDR 20000505SH030](https://openairdocs.org/sdr/20000505SH030.md): Gear · broken · Apr 18, 2000 · N5691W · Enstrm 280C · Tail Rotor Gearbox > PILOT REPORTED NOT BEING ABLE TO SEE OIL LEVEL IN SIGHT GLASS. WHEN SIGHT GLASS REMOVED, A PIECE OF GEAR SET (TOOTH) ABOUT.4375 INCH LONG WAS FOUND INSIDE. ACFT HAD RETURNED FROM FLYING, AND THERE WAS NO VIBS OF NOISE. WEAR MARKS ON BROKEN PART GAVE APPEA - [SDR 99ZZZX2944](https://openairdocs.org/sdr/99ZZZX2944.md): Oil Cooler · damaged · Jul 1, 1999 · N5691W · Enstrm 280C · Engine Oil Cooler > ALTERNATOR WAS INSTALLED ON THE AIRCRAFT WITHOUT REMOVING THE COOLING FAN FROM THE ALTERNATOR PER THE ENSTROM MM. FAN THREW A BLADE WHICH PUNCTURED THE OIL COOLER CAUSING LOSS OF ENGINE OIL. SUBMITTER SUGGESTED BULLETINS CALLING FOR INSPECTION OF INSTALLING - [SDR 99ZZZX2943](https://openairdocs.org/sdr/99ZZZX2943.md): Alternator · misinstalled · Jul 1, 1999 · N5691W · Enstrm 280C · AC Generator-Alternator > ALTERNATOR WAS INSTALLED ON THE AIRCRAFT WITHOUT REMOVING THE COOLING FAN FROM THE ALTERNATOR PER THE ENSTROM MM. FAN THREW A BLADE WHICH PUNCTURED THE OIL COOLER CAUSING LOSS OF ENGINE OIL. SUBMITTER SUGGESTED BULLETINS CALLING FOR INSPECTION OF INSTALLING - [SDR AU980382](https://openairdocs.org/sdr/AU980382.md): Bearing · failed · Apr 8, 1998 · Enstrm 280C · Main Rotor Head > (AUS) MAIN ROTOR HUB `LAMAFLEX' BEARING FAILED IN-FLIGHT. - [SDR 98ZZZX1111](https://openairdocs.org/sdr/98ZZZX1111.md): Strut Bearing · cracked · Feb 19, 1998 · N5695B · Enstrm 280C · Engine/Transmission Coupling > CAGE OF UPPER JACK STRUT BEARING WAS FOUND BROKEN DURING ANNUAL INSPECTION WHILE GREASING BEARING. THIS WAS THE SECOND BEARING FOUND IN THIS CONDITION. IT SHOULD BE NOTED THIS BEARING HAS A 600-HOUR LIFE LIMIT AND A 100-HOUR LUBE SCHEDULE. SUBMITTER STATED - [SDR 99ZZZX342](https://openairdocs.org/sdr/99ZZZX342.md): Cylinder · damaged · Oct 10, 1997 · N51703 · Enstrm 280C · Reciprocating Engine Cylinder Section > DURING ANNUAL INSPECTION, 10-10-97, FOUND NR 2 CYLINDER COMPRESSION WAS LOW. AFTER INSPECTION OF CYLINDER, INTAKE VALVE SEAT WAS FOUND LOOSE, INTAKE VALVE WAS BURNT. AT THAT TIME, THE OWNER SHOWED 2 MORE CYLINDERS FROM PAST MAINTENANCE WITH THE SAME CONDITIO - [SDR 99ZZZX341](https://openairdocs.org/sdr/99ZZZX341.md): Stud · damaged · Oct 10, 1997 · N51703 · Enstrm 280C · Reciprocating Engine Cylinder Section > DURING ANNUAL INSPECTION, 10-10-97, NR 2 CYLINDER COMPRESSION LOW. AFTER INSPECTION OF CYLINDER, FOUND INTAKE VALVE SEAT LOOSE AND VALVE BURNT. SUBMITTER STATED POSSIBLE CAUSE MAY HAVE BEEN OVERBOOSTING ENGINE DURING FLIGHT INSTRUCTION. - [SDR 97ZZZX2836](https://openairdocs.org/sdr/97ZZZX2836.md): Windshield · cracked · May 1, 1997 · N122TV · Enstrm 280C · Flight Compartment Windows > DURING ENGINE START ON A COLD MORNING, RT WINDSHIELD CRACKED APPROXIMATELY 14 INCHES FROM CENTER WINDSHIELD ANCHORING STRIP TOWARD OUTBOARD OF AIRCRAFT. POSSIBLY HAD A PREVIOUS CRACK AT RIVET LOCATION THAT WAS HIDDEN UNDER CENTER STRIP. - [SDR 97ZZZX1911](https://openairdocs.org/sdr/97ZZZX1911.md): Windshield · cracked · Mar 1, 1997 · N122TV · Enstrm 280C · Flight Compartment Windows > OUTSIDE AIR TEMP (27 DEGREES FAHRENHEIT). ON ENGI\EEN START-UP, WINDHSIELD CRACKED HORIZONTALLY APROXIMATELY 14 INCHES ONE-THIRD OF THE WAY UP FROM BOTTOM. CRACK ORIGINATED AT CENTER WINDSHIELD ATTACH RIVET. - [SDR CA960715008](https://openairdocs.org/sdr/CA960715008.md): Damper · sheared bolt · Jul 4, 1996 · Enstrm 280C · Main Rotor Head > (CAN) BOLT FOUND SHEARED IN TWO AT THE ATTACHMENT TO THE MAIN ROTOR HUB. - [SDR AU960515](https://openairdocs.org/sdr/AU960515.md): Pipe · wrong part · Jan 26, 1996 · Enstrm 280C · Engine Fuel Distribution > (AUS) NO1 CYLINDER EXHAUST VALVE SEAT DROPPED CONTACTING THE PISTON AND CAUSING CYLINDER FAILURE - ENGINE WAS BULK STRIPPED AND INVESTIGATION OF NO1 CYLINDER ASSEMBLY FOUND: 1. EXTERNAL SIGNS OF OVERHEATING 2. FUEL INJECTION PIPE FLOW 7PPH - NORMAL IS 30PPH - [SDR 96ZZZX1027](https://openairdocs.org/sdr/96ZZZX1027.md): Regulator · shorted · Dec 12, 1995 · N51742 · Enstrm 280C · DC Regulator > VOLTAGE REGULATOR SHORTED OUT CAUSING RUN AWAY ALTERNATOR. REPLACED REGULATOR. SUBMITTER SUGGESTS NEW PART NUMBER REGULATOR, ELD-069-11. - [SDR 95ZZZX6199](https://openairdocs.org/sdr/95ZZZX6199.md): Control · not installed · May 13, 1995 · N613LG · Enstrm 280C · DC Generating System > FOLLOWING REBUILD, HELICOPTER WAS RETURNED TO SERVICE WITHOUT THE OVERVOLTAGE CONTROL INSTALLED. REGULATOR SPIKED AND COOKED RADIOS AND GYROS. CABIN FILLED WITH SMOKE. AIRCRAFT SUBSTANTIALLY DAMAGED IN SUBSEQUENT EMERGENCY LANDINGS. SUBMITTER RECOMMENDS IN ## The whole list in SQL Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS: ```sql SELECT sdr_id, difficulty_date, n_number, aircraft_make, aircraft_model, part_name, part_condition, jasc_code, discrepancy FROM 'https://openairdocs.org/data/latest/faa_service_difficulty_report.parquet' WHERE aircraft_model_key = '280C' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/model/enstrom-helicopter-280c/reports --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.